Warthen with the Mets in 2016
|Born: December 1, 1952|
|May 18, 1975, for the Montreal Expos|
|Last MLB appearance|
|September 29, 1978, for the Houston Astros|
|Earned run average||4.31|
Warthen was drafted by the Montreal Expos in the 2nd round of the 1971 Major League Baseball Draft. Warthen made his Major League Baseball debut with the Expos on May 18, 1975, pitching a scoreless eighth inning against the Cincinnati Reds. He pitched four seasons in the major leagues with Montreal, Philadelphia and Houston. He finished his major-league career with a 12–21 win–loss record and a 4.31 ERA.
Warthen began his coaching career with the Pittsburgh Pirates in 1981, following that with coaching in the minor league organizations of San Diego and Philadelphia. Warthen was the pitching coach for the Detroit Tigers (1999–2002), San Diego Padres (1996–97) and Seattle Mariners (1992), also serving as the Mariners bullpen coach in 1991. He was the pitching coach for the Triple A Norfolk Tides from 2003–2005.
Warthen served as the bullpen coach for the Los Angeles Dodgers under manager Grady Little from 2006–2007. On June 17, 2008 Warthen was named the New York Mets pitching coach, replacing Rick Peterson. In the 2012 off-season rumors speculated that Warthen would not return due to the staff changes but he stayed along with then hitting coach Dave Hudgens.
In 2014, Warthen used the slur "Chinaman" in a conversation with an Asian American interpreter in the clubhouse. He later issued an apology.
Warthen was relieved of his coaching position on October 3, 2017, but was offered another role with the organization, which he declined.
- Cerrone, Matthew (October 5, 2011). "Recap: Mets change coaching staff, Hale goes to A's". MetsBlog.com. Archived from the original on 2012-01-16. Retrieved 2012-01-30.
- Rubin, Adam. "Mets pitching coach sorry for slur". espn.go.com. March 13, 2014. Retrieved October 27, 2015.
- Career statistics and player information from MLB, or Baseball-Reference, or The Baseball Cube, or Baseball-Reference (Minors) Warning: Template:Baseballstats cube= parameter should be updated to a numeric value., or Retrosheet, or Pura Pelota (Venezuelan Winter League), or New York Mets website (Biography)
| Seattle Mariners bullpen coach
| Seattle Mariners pitching coach
| San Diego Padres pitching coach
| Detroit Tigers pitching coach
| Los Angeles Dodgers bullpen coach
| New York Mets pitching coach